The United States Senate did just that last April in their well-researched Senate Resolution 511 which determined that John McCain was a "natural born" citizen because he met two important conditions: both parents were American citizens and he was born on American territory. This Resolution may not be Law but it is based upon the Senate's research of the Law and the Courts.
Not a lot of research needed to go into that, just a look at existing U.S. law. McCain was a natural born citizen not because he was born on U.S. territory - he was born on Panamanian soil - but because his father was in the military stationed overseas and both his parents were U.S. citizens who had lived in the United States for a number of years prior to his birth. He is just as much a natural born U.S. citizen as if he'd been born in New York or Washington. I do not dispute that at all. But likewise, if Obama was born in Hawaii then he, too, is a natural born U.S. citzen and eligible to be president. The nationality of his father, as the Supreme Court has found, is irrelevant.
Don't confuse me with Donofrio or his adherents.